president obama appeared before reporters at the white house on wednesday for his first news conference since winning his second term. he made some of his most extensive comments on climate change to date, acknowledging that his administration had fallen short in taking on global warming. >> we have not done as much as we need to. what i am going to be doing over the next several weeks it, next several months, is having a conversation with scientists, engineers, and elected officials to find out what more can we do to make short-term progress in reducing carbons, and then working through an education process that i think it is necessary, a conversation across the country, about what realistically can do long term. >> despite hard to take action on climate change, obama said he will not advance any environmental policy that override economic concerns. >> there is no doubt that for us to take on climate change and a serious way would involve making some tough political choices. understandably, i think the american people right now have been so focused and will continue to focus on our eco